Carolina Durante is a Spanish indie rock band formed in 2017 in Madrid composed of Diego Ibáñez, Martín Vallhonrat, Juan Pedrayes and Mario del Valle. The group signed a joint record deal with Sonido
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83295f1b8519b35c87f3da9c89d4bfe65b1b4a3d9957fb037bc613d18c8b4ca4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73fea250-0cfe-45c8-b2eb-0309cf385492.json and https://artists.proofprofile.net/proofs/artist/73fea250-0cfe-45c8-b2eb-0309cf385492.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb90ab4a0ff7152c07bdf1eda249008e1bae332df9b2d77329ee0ed4883ac22d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES1701800249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a13cdd13d47329594b077347b16a7ca839ce34dc5967f91ac41ac48818e8466. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5702100890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968c90db58f71c8ea0cbb6116e0071fc95277af354a67a6583490aa52c71acb3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5702100898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c23f6218d0e1434e0db28e242bdc82f4326f7e8adb174c4ba1abc4551783807. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5702100888.
Famoso en tres calles (En directo en el Wizink Center / Madrid, 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073204a1d18c5b8e030e959fc9a46526ee10279cf79579e51171caf9b0018d0c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESUV72400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a0310cc105d7bdf36cfdc906bb17090226016f1550da5309b534eea87720b3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESUM72500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde2ec3a543925d24331628bb4031abd85a1221621bdb1b364a72438a07c0034. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5701801167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a6730b2728b18aa898f0bdae1eb95d571a58ca552825a3b7790b10bafa8e45. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES09S2100174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde2ec3a543925d24331628bb4031abd85a1221621bdb1b364a72438a07c0034. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5701801167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca982e9ec87e06410490494f64184164c30d307beffa8f2eaa68e6a181754ca6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5702400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99105dc82c692b10d527cdd0216da929f33593bc0cd8b27d7578d923ba0c6d9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7002150303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6730b6f15b72f6e41a97bbe146b055712417910010c4bd909c4ec7902c0c57e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2094007.
Super H (Homenaje al Super 8 de Los Planetas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a0310cc105d7bdf36cfdc906bb17090226016f1550da5309b534eea87720b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESUM72500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c92e72f9fe51b57b14927c16ffd4b1570af5ba2880fe5e6a514a65f75b4b880. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5702200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed5fd432118c1c67fe728f3a1df93d8c92996a7d93a8eab3279257e30037669. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESUM72301670.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ea1e729539ff17453e21f31631d3622c046875b02ce1ec56ad02419a595ed3. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5702300231.